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Hf e.v sr'onns, or NEW ,Youre NL Y. Letters .Patent No.73,666; datedJanuary 21, 1868.

IMPROVEMENT IN LOCKING KNOB-LATCHES.

dlgs stimule nieren tu iu time yates @anni mit new TO ALL'WHOM IT MAYCONCERN:

Be it known that* I, H. C. SToRRs, of the city, county, and State of NewYork, have invented anew and useful Improvement in Locks or l IIatclIi-olts, ofwhieh the following is a full, clear, and exactdescription, reference being had to the accompanying drawing, formingpart of this specification, and in which- Fignre 1 represents aninterior faceview of a lock constructed according to my improvement, and

Figure 2 a sectional View at right angles to iig. 1.

Similar .letters of reference indicate corresponding parts. Y

My invention relates to latch-bolts or ,locks that, on closing to thedoor, cause the bolt to spring into catch with the jamb or otherfixture; andthe invention consists in a combination, with suchlatch-bolt, of a loekingbolt to the latter, so applied, constructed, andoperating that, whileit does not interfere with the'inward and afteroutward shooting into catch of the latch-bolt, on and by the operationof closing the door, operates automatically, or by said movement ofclosing to the door, to .lockthe latch-bolt, so that thelattcr'isrestrained from being opened or shot back without first, by anysuitable special contrivance, such as a knob or key, being released fromhold on it of the locking-bolt.

While-my invention is capable-ot' various modifications or diierentconstructions, the arrangement represented in the accompanying drauvingwill suice to explain it.

In said drawing, A represents the lock or latch-ease, and B the main orordinary latch-bolt, that may be opened by turning a hub, C, throughknob connected'therewith, from either or bot-h sides of thedoor, or thatmay be shot or forced inwards by the bcyelled nose of the latch-boltstriking, on closing the door, a plate, D, or projecting portion of thejamb, (or it muy be,Y second door, or other equivalent obstacle,) and sothat, on `the door being shut, said hitch-bolt is thrown, by the actionof a spring, into gear or catch with a recess, E, sub-v stantially as invarious well-known latch-bolts or locks..v To such vlatch-bolts orlocksit is customary to attach locking-bolts or catches to prevent thelatch-bolt being opened till released from hold on it by thelocking-bolt, and which may be donc by the application of a slide, knob,or key; but in all such 'previous eonstructipns, this locking-bolt hasrequired a separate manipulation to shoot it into lock with thelatch-bolt on closing the door, so that'in ense of this 'separatemanipulation being omitted or neglected, the door may be opened bysimply working the main latch. or latch-bolt. This, however, cannot bedone by the arrangement represented in the drawing, where thelatchbolt Bis shown as having combined with it aslidin'gbolt, F, on the side orface thereof, which occupies a rear Vposition to' the bevel otthefrontend or nose of the bolt, and which, working through the front end'of the loek-casc, is arranged to project beyond the rear face of thelatch-bolt, so that, on closing the door, not-'only will the latch-boltbe forced inwards, bu't also the bolt F, by` striking the plate orobstacle D, and will remain so forced inwards when the door is closedand after the latch-bolt B has shot forward into gear with the recessThis bolt F, in thus being shot inwards, is held closed while thelatchbolt B flies into the recess E and` causes-an arm, b, pivoted, asat c, to the latch-bolt, and controlled by a spring, d, to shoot intolock with a stop, e, which prevents the latch-bolt from being forcedinwards till a. key or` other special device is used to lift the arm 6out of lock with the stop e. On the arm h being so raised, however, andthe latch-bolt drawn back, the arm b slides back, with the bolt B, clearof the stop e, and is restrained fsenr falling into lock therewith by asaddle,j', fast to the arm b, so that on again closing thedoor the boltlF is free to move backwards to-e'stablish lock of the latchbolt, asbefore. A spring, g, serves to shoot the bolt F forwards when released;and an incline or recess, h, in saidbolt admits of the depression of thesaddlef when the bolt F is forced inwards by the plate D, andthe springd shoots thearm b into lock with the stop e.

It is not absolutely essential that thelocking-bolt (which may bevariously constructed) to the latch-bolt should slide in or4 on thelatter, as it may be arranged above orbelow it, to operate substantiallyas described.

What I claim as my invention, and desire to secure by Letters Patent,is- I The combination of the locking-bar (a, pivoted to the latch-bolt,with the bolt F and latch-bolt B, substantially as shown and described.i H. C. STO-RRS. Witnesses: y

J. W. Cocinas,

G. W. REED.

